Low soil fertility is the number one reason weeds will take over a lawn, so using a good organic compost distributed over your lawn every year will help a great deal. Weeds do not typically like fertile soils and thrive more in exhausted soils with little organic matter.
Also weed seeds tend to lose their viability sooner in bacteria-rich soil than in one poor in bacterial life, ” says Rodale Institute.
Do not cut your grass any shorter than 2 inches tall or a good rule of thumb is do not cut off more than 1/3 of the green leaf or blade of the grass. Cutting grass too short will not only encourage weeds to get established, it will hamper the growth of the grass. Keeping your grass a bit longer may mean having to mow it a bit more often, but the shade provided by the longer grass will cut down on watering, weeding and brown patches thus eliminating lawn care in the long run.
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